Factory striker spring and light ie 11 pound recoil spring can cause it to come out of battery. If you go 11 pound and even sometimes 13 pound a light weight striker spring is needed. When going with a light striker spring it is also nice to have an extended LW striker. I like the Jager one best as it actually feels better in the trigger dept. Another spring combo to avoid is an extra power trigger spring and a light striker spring as this dosent always allow the trigger safety to engage.
Spring combos to avoid
Light striker spring and extra power trigger spring-----dosent always allow trigger safety to reset
Light ie 11 pound recoil spring and factory striker spring----can pull slide out of battery
Spring combos that work
Light weight striker spring, light weight striker ie jager, factory trigger spring, 13 pound(maby 11 pound if you check to make sure the slide stays in battery and keep an eye on it as spring wears) recoil spring